diff --git a/nixos/users/albert/default.nix b/nixos/users/albert/default.nix
index b5e61840..4904df9c 100644
--- a/nixos/users/albert/default.nix
+++ b/nixos/users/albert/default.nix
@@ -1,11 +1,14 @@
-{ config, desktop, lib, pkgs, ... }: {
+{ config, desktop, lib, pkgs, ... }: 
+let
+  ifExists = groups: builtins.filter (group: builtins.hasAttr group config.users.groups) groups;
+in {
   # Define a user account.
   imports = [ ]  ++ lib.optional (builtins.isString desktop) ./desktop.nix;
   users.users.albert = {
     isNormalUser = true;
     description = "Albert J. Copeland";
     # video is required for the "light" command to work
-    extraGroups = [ "networkmanager" "wheel" ] ++ ifExists [  "video" ];
+    extraGroups = [ "networkmanager" "wheel" ] ++ ifExists [ "video" ];
     hashedPassword = "$y$j9T$wKLsIWaA4Gf63RvjedwLJ0$EHKL6BBJV0CAxEKcHHjaBqW085KJ/MGvmbyWzmcWOy6";
     packages = [ pkgs.home-manager ];
   };